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Full text of "Text Book Of Mechanical Engineering"

1136

Appendix VI.

inertia of  the indicator piston and  enlarging levers has, how-
ever, been overcome in the Carpentier-Hospitalier Manograph, in

oft  ENGINE: /NDICATOH  BY UGHT.

which the necessary movements have very small amplitude, while
the enlargement is entirely effected by a beam of light Referring
to Fig. 1004, A is a box or light-tight camera, having a ground
glass or photographic plate at B, and indicating mechanism at the